NSD-NRC-96-4643, Forwards Proprietary Info on Accident Specification & Phenomena Evaluation for AP600 Passive Containment Cooling Sys.Encl Provided in Response to NRC Request Made at 951206 Meeting.Encl Withheld (Ref 10CFR2.790)

Forwards Proprietary Info on Accident Specification & Phenomena Evaluation for AP600 Passive Containment Cooling Sys.Encl Provided in Response to NRC Request Made at 951206 Meeting.Encl Withheld (Ref 10CFR2.790)

ML20100F299
Person / Time
Site:	05200003
Issue date:	02/12/1996
From:	Mcintyre B WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP.
To:	Quay T NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML19355C667	List: ML20100F305 NSD-NRC-96-4643, Forwards Proprietary Info on Accident Specification & Phenomena Evaluation for AP600 Passive Containment Cooling Sys.Encl Provided in Response to NRC Request Made at 951206 Meeting.Encl Withheld (Ref 10CFR2.790)
References
NSD-NRC-96-4643, NUDOCS 9602210124
Download: ML20100F299 (4)

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Westinghouse Energy Systems Box 355 Electric Corporation Pittsburgh Pennsylvania 15230-0355 NSD-NRC-96-4643 DCP/NRC0463 Docket No: STN-5.-003 February 12, 1996 Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555 ATTENTION: T.R. QUAY

SUBJECT:

ACCIDENT SPECIFICATION AND PHENOMENA EVALUATION FOR AP600 PASSIVE CONTAINMENT COOLING SYSTEM l

Dear Mr. Quay:

Enclosure I to this letter provides information on the accident specification and phenomena evaluction for the AP600 passive containment cooling system (PCS), This enclosure is provided in response to i an NRC request made at a December 6,1995 meeting. The accident specification includes a j definition of the issue and success criteria, the event scenario, the plant components, and the transport j processes involved. The phenomena evaluation and ranking tables (PIRT) list the plausible phenomena according to the affected components and rank the processes according to their importance relative to containment pressure. The enclosed report is provided at this time to support NRC l activities toward completion of the AP600 Supplemental Draft Safety Evaluation Report. 1 This submittal contains Westingbouse proprietary information consisting of trade secrets, commercial information ce financial information which we consider privileged or confidential pursuant to 10CFR2.790. Therefore, it is requested that the Westinghouse proprietary information attached hereto te handled on a confidential basis and be withheld from public disclosures. The non-proprietary copy of Enclosure f is provided as Enclosure 2.

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NSD-NRC-96-4643 DCP/NRC0463 February 12, 1996 This material is for your internal use only and may be used for the purpose for which it is submitted.

It should not be otherwise used, disclosed, duplicated, or disseminated, in whole or in part, to any other person or organization outside the Commission, the Office of Nuclear Reactor Regulation, the Office of Nuclear Regulatory Research and the necessary subcontractors that have signed a proprietary non-disclosure agreement with Westinghouse without the express written approval of Westinghouse.

Correspondence with respect to the application for withholding should reference AW-96-924, and should be addressed to B. A. McIntyre, Manager of Ad.anced Plant Safety and Licensing, Westinghouse Electric Corporation, P.O. Box 355, Pittsburgh, Pennsylvania, 15230-0355.

Please contact John C. Butler (412-374-5268) if you have any questions concerning this submittal.

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Brian A. McIntyre, Manager Advanced Plant Safety and Licensing

/nja Attachment Enclosure cc: T. Kenyon, NRC (w/o Attachment or Enclosures)

D. Jackson, NRC (IEl)

E. Throm, NRC (IEl)

J. Kudrick, NRC (IEl)

P. Boehnert, ACRS (IEl)

B. A. McIntyre, Westinghouse (w/o Attachment or Enclosures)

N. J. Liparulo, Westinghouse (w/o Attachment or Enclosures)

COPYRIGHT NOTICE The reports transmitted herewith each bear a Westinghouse copyright notice. The NRC is permitted to make the number of copies of the information contained in these reports which are necessary for its internal use in connection with generic and plant-specific reviews and approvals as well as the

' issuance, denial, amendment, transfer, renewal, modification, suspension, revocation, or violation of a license, permit, order, or regulation subject to the requirements of 10 CFR 2.790 regarding restrictions on public disclosure to the extent such information has been identified as proprietary by Westinghouse, copyright protection notwithstanding. With respect to the non-proprietary versions of there reports, the NRC is permitted to make the number of copies beyond those necessary for its internal use which are necessary in order to have one copy available for public viewing in the appropriate docket files in the public document room in Washington, D.C. and in local public document rooms as may be required by NRC regulations if the number of copies submitted is insufficient for this purpose. Copies made by the NRC must include the copyright notice in all instances and the proprietary notice if the original was identified as proprietary.

PROPRIETARY INFORMATION NOTICE Transmitted herewith are proprietary and/or non-proprietary versions of documents furnished to the NRC in connection with requests for generic and/or plant specific review and approval.

In order to conform to the requirements of 10 CFR 2.790 of the Commission's regulations concerning the protection of proprietary information so submitted to the NRC, the information which is proprietary in the proprietary versions is contained within brackets, and where the proprietary information has been deleted in the non-proprietary versions, only the brackets remain (the information that was contained within the brackets in the proprietary versions having been deleted).

t The justification for claiming the information so designated as proprietary is indicated in both versions by means of lower case letters (a) through (f) contained within parentheses located as a superscript immediately following the brackets enclosing each item of information being identified as proprietary I

or in the margin opposite such information. These lower case letters refer to the types of information Westinghouse customarily holds in confidence identified in Section (4)(ii)(a) through (4)(ii)(f) of the affidavit accompanying this transmittal pursuant to 10 CFR2.790(b)(1).

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